Physics Final
The Plane above is frictionless and inclines at 30 angle. The mass m is 6kg. If the mass is lowered at a constant velocity, what is the tension T in the rope? a) 0N b)30N c) 60N d) 90N
(b) 30N
The Plane above is frictionless and inclined at 30 angle, the mass m is 6kg. If the mass is accelerated up the plane at 2ms-2, what is the tension T in the rope? a) 30N b)36N c)42N d) 72N
(c) 42N
The plane above is frictionless and inclined at 30 angle. The mass m is 10kg. If the tension T in the rope is a constant 75N, the mass starts from rest, what is the velocity of the mass after 2s? a) 5 m/s down the plane b) 2.5 m/s up the plane c) 5m/s up the plane d) 7.5 ms up the plane
(c) 5m/s up the plane
velocity of the object in first 5 s : a)1 ms^-1 b)9.8 ms^-1 c)0 ms^-1 d)2 ms^-1
A) 1 ms ^-1
A projectile launched straight up at 10 ms ^-1 will reach a maximum height in: A)1 s B)1.4 s C)2 s D)5 s
A) 1 s
A race care driver steps on the gas, and his race car travels 20 meters in 2 seconds starting from rest. The acceleration of the race car is: a)10 ms^-2 b)9.8 ms^-2 C)0 ms ^-2 d)2 ms ^-2
A) 10 ms^-2
The plane above is inclined at a 30 angle. The coefficient of kinetic friction between the mass and the plane is 0.1. The mass is 100kg. What is the minimum tension required in the rope so that the mass will accelerate down the plane at 2ms-2? a) 213 N b) 387 N c) 613 N d) 787 N
A) 213N
A body a moves with a uniform acceleration a and zero initial velocity. Another body B, starts from the same point moves in the same direction with a constant velocity v. The two bodies meet after a time t. The value of t is: a) 2v/a b) v/a c)v/2a d)square root 2v/a
A)2v/a
if the graph above is a veloity-time graph, what is the displacement in the first 6s? a)30m b)45m c)90m d)180m
A)30m
A car accelerated from initial position and then returned at initial,then: a) Velocity is zero but speed increases b) speed is zero but velocity increases c)Both speed and velocity increase d)Both speed and velocity
A. Velocity is zero but speed increases
A projectile launched straight up at 10 ms^-1 will reach a maximum height of: a)5m b)10m c)25m d)50m
A.53m
A particle accelerates at 10 ms^-2 for 2 s. if its final velocity is 5 m s ^-1, what was its initial velocity? a) -25 ms^-1 b)-15 ms^-1 c)25 ms^-1 d)50 ms^-2
B) - 15 ms^-1
A person completes half of its journey with speed v1 and rest half with speed v3. The average speed of the person is: A)v= v1 + v2 / 2 B)v= 2v1V2 /v1 +v2 C)v= v1v2 /v1+v2 D)v=v1 x v2
B) 2v1v2/v1 +v2
ignoring air resistance, which of the following properties of a projectile remains constant throughout its flight? a) vertical velocity b)horizontal velocity c)speed d)displacement
B) horizontal velocity
If the graph above is a velocity time graph between 6s and 8s the motion represented has: a)positive acceleration and is backwards b)positive acceleration and is forwards c)negative acceleration and is backwards d)negative acceleration and is forwards
B) positive acceleration and is forwards
An object is dropped from a height h and strikes the ground with a velocity v. If the object is dropped from a height of 2h, which of the following represents its velocity when it strikes the ground? a)v b)1.4 v c)2v d)4v
B)1.4v
A projectile launched straight up at 10 ms^-1 will strike the ground at: a)5 ms^-1 b)10 ms^-1 C)25 ms^-1 d)50 ms ^-1
B)10 ms^-1
a constantly accelerating particle travels for 3 s. if its inital velocity is 10 ms ^-1 and it travels 75m, what is its acceleration? a)5 m s ^-2 b)10 m s^-2 c)16.67m s ^-2 d)25m S^-2
B)10m s^-2
A race car driver steps on the gas, changing his speed from 10 ms^-1 to 30 ms ^-1 in 4 seconds. The acceleration of the race car is: a)5 ms^-1 b)5 ms^-2 c)2 ms -2 d) 4 ms ^-2
B)5 ms^-2
if force; F=ax +bt^2+c, x is distance, and t is time.Then what is the dimension of axc/bt^2? a)M^1L^2T^-2 B)M^1L^1T^-2 C)M^0L^0T^0 D)M^1L^1T^-1
B)M^1L^1T^-2
Velocity of the object in 5 to 10 s: a) 1 ms^-1 b)9.8 ms^-1 c)0 ms^-1 d)2 ms^-1
C) 0 ms^-1
A projectile launched straight up at 10 ms^-1 will be in the air for: a)1 s b)1.4 s c)2 s d)5 s
C) 2 s
Which of the following statement is/are true? 1) If the sum of the external forces on an object is zero, then the sum of the external torques on it must also be zero 2) If the sum of the external torques on an object is zero, then the sum of the external forces on it must also be zero. 3) If the sum of both the external torques and the external forces on an object is zero, then the object must beat rest. 4) If an object remains at rest, then the sum of both the external torques and the external forces on the object must be zero. a) 1 & 2 only b) 3 & 4 only c) 4 only d) all of the above
C) 4 only
freely falling bodies experience: a)motion with constant velocity b)motion with zero accelertion c)motion with constant acceleration d)motion at a constant speed
C) motion with constant acceleration
Acceleration of the object in 5 to 10 s: a) 1 ms ^-2 b)9.8 ms^-2 c)) ms^-2 d)2 ms^-2
C) ms^-2
The slope of a velocity vs. time graph is the; a)distance b)velocity c)acceleration d)none of the above
C)acceleration
A car moving with a speed of 50 km/hr can be stopped by brakes after at least 6m. If the same car is moving at a speed of 100 km/hr, the minimum stopping distance is: A) 6m B) 12m c) 18 m d) 24 m
D) 24M
As the ball is going downwards: a)the velocity and acceleration both point up b)the velocity points up and the acceleration down c)the velocity points down and the acceleration up d) the velocity and acceleration both points down
D) the velocity and acceleration both points down
The slope of a distance vs. time graph is the: a)distance b)velocity c)acceleration d)none of the above
D) velocity
As the mass of the projectile increases, the maximum height h (no air resistance): a) distance b)increases c)increases then decreases d)-10 ms^-2
D)- 10 md^-2
Twenty milliseconds is: a)0.00002s b)0.0002s c)0.002 s d)0.02s
D)0.02s
The velocity of a bullet is reduced from 200 ms^-1 to 100 ms^-1 while traveling through a wooden block of thickness 10 cm. The retardation, assuming it to be uniform, will be: a)10 X 10^4ms^-2 b)12 X 10^4ms^-2 c)13 X 10^4ms^-2 d)15 X 10^4ms^-2
D)15 C10^4ms^-2
A car, moving with a speed of 50 km/hr, can be stopped by brakes after at least 6m. IF the same car is moving at a speed of 100 km/hr, the minimum stopping distance is: a)6m b)12m c)18m D)24m
D)24m
An object dropped from a height of 13 m strikes the ground at 16 ms ^-1. In order for the object to strikes the ground at 32 ms ^-1 a)18m b)26m c)39m d)52m
D)52m
An object dropped from a height of 13 m strikes the ground at 16 ms^-1. In order for the object to strikes the ground at 32ms ^-1, it must be dropped from: a) 18m b)26m c)39m d)52 m
D)52m
The dimensional formila for light year? a)M^0L^-1T^-2 b)M0L^0T^1 c)M^3L^-2T^-3 D)M^0L^1To
D)M^0L^1To
If force=(x/density) + C is dimensionally correct, the dimension of x are: a) MLT^-2 b)MLT^-3 c)ML^2T^-3 d)M^2L^-2T^-2
D)M^2L^-2T^-2
A bullet of mass m moving with a velocity v strikes a suspended wooden block of mass M as shown in the figure and sticks to it. If the block rises to a height h the initial velocity of the bullet is: a) (m+ M) /m (sq rt 2gh) b) (sq rt 2gh) c) (m+ M) /M (sq rt 2gh) d) m /(M+m) (sq rt 2gh)
a) (m+ M) /m (sq rt 2gh)
A box of mass m is sitting on an incline of 45 degrees and it requires an applied force F up the incline to get the box to begin to move. What is the maximum coefficient of static friction? a) (sqrt of 2F/mg) - 1 b) (sqrt of 2F/mg) +1 c) (sqrt of 2F/mg) d) ( 2F/mg) - 1
a) (sqrt of 2F/mg) - 1
Calculate the work done to blow up a soap bubble of radius 5 cm. The surface tension of the soap solution is 0.03 N/m. a) 0.0019 J b)1.900 J c) 0.990 J d) 0.0009J
a) 0.0019 J
A dvd is initially at rest so that the line PQ on the discs surface is along the +x-axis. The disc begins to turn with a constant αz= 5.0 rad.s^-2. At t=0.40 s, what is the angle between the line PQ and the +x-axis? a)0.4 rad b)0.8 rad c)1 rad d)1.6 rad e)2.0 rad
a) 0.4 rad
A 0.12kg block is held in plae against the spring by a 35 N horizontal external force. The external force is removed and the block is projected with a velocity v=1.2 m/s when it separates from the spring, as shown in the figure. The block descends a ramp has a velocity v2= 1.4 m/s at the bottom ofthe ramp. The track is frictionless between points A and B. The block enteres a rough section at B extending to E. The coefficient of kinetic friction between the block and the rough surface is 0.26. The block moves on to D, Where it stops. By how many centimeters was the spring initially compressed? a) 0.49 cm b) 0.26 cm c) 0.18 cm d) 0.89 cm
a) 0.49 cm
A rectangular wooden block measures 10.0 cm x 4.00 cm x 2.00 cm. When the block is placed in water, it floats horizontally, with its bottom face 1.65 cm below the surface. What is the density of the wood? The density of water is 1.00 gcm^-3. a) 0.825 gcm^-3 b) 1.21 gcm^-3 c) 1.65 gcm^-3 d) 0.350 gcm^-3
a) 0.825 gcm^-3
Work done by a force of 1 N which moves an object a distance of 1 m in a specific direction is termed as: a) 1 Joule b) 1 Pascal c) 1 Watt d) 1 Ohm
a) 1 Joule
A projectile launched straight up at 10 m/s will reach a max height in: a) 1 s b) 1.4 s c) 2 s d) 5s
a) 1 s
What is the density of Ocean water at a depth where the pressure is 90 atm, given that its density at the surface is 1.03 x 10^-3 kg m ^-3 ( Compressibility of water = 45.8 x 10^-11 Pa^-1) a) 1.03 x 10^3 kg m^-3 b) 1.5 x 10^3 kg m^-3 c) 0.99 x 10^3 kg m^-3 d) 1.33 x 10^3 kg m^-3
a) 1.03 x 10^3 kg m^-3
The figure shows an acceleration versus force graph for three objects pulled by wires. If the mass of object 2 is 36kg, what are the masses of objects 1 and 3? a) 12kg and 90 kg b) 72kg and 18 kg c) 90 kg and 12 kg d) 12kg and 72kg
a) 12kg and 90kg
Water flows out of a large reservoir through an open pipe. What is the speed of the water as it comes out of the pipe? a) 13ms^-1 b) 9.9ms^-1 c) 8.9ms^-1 d) 16ms^-1
a) 13ms^-1
A 1000 kh car traveling at 60 km/hr hits a stationary truck weighing 20,000 N. If the truck has a velocity of 1 m/s after the crash, what is the velocity of the car after the crash? a) 14.5 m/s in the same direction it was initially traveling. b) 14.5 m/s in the opposite direction it was initially traveling c) 19 m/s in the same direction d) 19 m/s in the opposite direction
a) 14.5 m/s in the same direction it was initially traveling.
A meteor with a mass of 1kg moving at 20km/s collides with Jupiter's atmosphere. The meteor penetrates 100 km into the atmosphere and disintegrates. What is the average force on the meteor once it enters Jupiter's atmosphere? a) 2x10^3 N b) 4x10^3 N c) 8 x 10^3 N d) 2 x 10^5 N
a) 2 x 10^3 N
A 4kg ball has a momentum of 12 kgm/s what is the ball speed? a) 3 m/s b) 4 m/s c) 12 m/s d) 48 m/s
a) 3 m/s
How much work must be done by frictional forces in slowing a 1000 kg car from 26.1 m/s to rest? a) 3.41 x 10^5 J b) 2.73 x 10^5 J c) 4.09 x 10^5 J d) 4.77 x 10^5 J
a) 3.41 x 10^5 J
A sphere is accelerated upwards with the help of a cord whose breaking strength is five times its weight. The maximum acceleration with which the sphere can move up without cord breaking is: a) 4g b) 3g c) 2g d) g
a) 4g
A sphere is accelerated upwards with the help of a cord whose breaking strength is five times its weight. The maximum acceleration with which the sphere can move up without the cord breaking is: a)4g b)3g c)2g d)g
a) 4g
A solid uniform sphere of mass 120 kg and radius 1.7 m starts from rest and rolls without slipping down an inclined plane of vertical height 5.3 m. What is the angular speed of the sphere at the bottom of the inclined plane? a) 5.1 rad.s^-1 b) 8.7 rad.s^-1 c) 9.7 rad.s^-1 d) 6.1 rad.s^-1
a) 5.1 rad.s^-1
A projectile launched straight up at 10 m/s will reach a max height of: a) 5 m b) 10 m c) 25 m d) 50 m
a) 5m
If the position vector of a particle is r = 3 i + 4j meter and its angular velocity is ω = j + 2k rad.sec^-1 then its linear velocity is (in ms^-1): a) 8 i- 6j + 3k b) -3 i -6j -6k c) 6i+ 8j + 3k d) 3i + 4j + 2k
a) 8 i- 6j + 3k
If the position vector of a particle is r= 3 i + 4j meter and its angular velocity is ω = j + 2 k rad.sec^-1 then its linear velocity is (in ms^-1): a) 8i -6j +3k b) -3i -6j -6k c) 6i +8j + 3k d) 3i + 4j + 2k
a) 8i - 6j + 3k
The four forces shown all have the same magnitude: F1= F2= F3= F4. Which force produces the greatest torque about the point O ? a) F1 b) F2 c) F3 d) F4
a) F1
If force, time, and velocity are treated as fundamental quantities; then dimensional formula of energy will be: a) FTV b) FT^2V c) F^1T^1V^2 d) F^1T^2V^2
a) FTV
A spinning ice skater on extremely smooth ice is able to control the rate at which she rotates by pulling in her arms. Which of the following statements are true about the skater during this process? a) Her angular momentum remains constant b) Her moment of inertia remains constant c) Her kinetic energy remains constant d) She is subject to a constant non-zero torque
a) Her angular momentum remains constant
A circular disc X of radius R is made from an iron plate of thickness t, and another disc Y of radius 4R is made from an iron plate of thickness t/4. Then the relation between the moment of inertia Ix and Iy is: a) Iy = 64 Ix b) Iy = 32 Ix c) Iy = 16 Ix d) Iy = Ix
a) Iy = 64 Ix
A circular disc x of radius R is made from an iron plate of thickness t, and another disc Y of radius 4R is made from an iron plate of thickness t/4. Then the relation between the moment of inertia Ix and Iy is: a) Iy= 64 Ix b) Iy= 32 IX c) Iy = 16 Ix d) Iy= Ix
a) Iy= 64 Ix
In order to do work energy is: a) Transferred or converted b) used up c) lost d) lost or transfered
a) Transferred or converted
The dimensional formula of RT is same as that of : a) energy b) force c) specific heat d) latent heat
a) energy
An incompressible fluid with zero viscosity flows through a pipe of varying radius. Compared to the fluid at point Q has: a) four times the fluid speed b) twice the fluid speed c) the same fluid speed d) half the fluid speed e) one-quarter the fluid speed
a) four times the fluid speed
An air bubble underwater has the same pressure as that of the surrounding water. As the air bubble rises toward the surface (temp. remains constant), the volume of the air bubble a) increases b) decreases c) remains constant d) increases or decreases, depending on the rate it rises
a) increases
Two forces produce equal torques on a door about the door hinge. The first force is applied at the midpoint of the door; the second force is applied at the doorknob. Both forces are applied perpendicular to the door. Which force has a greater magnitude? a) the first force (at the midpoint) b) the second force (at the door knob) c) Two forces are equal
a) the first force (at the midpoint)
A merry-go-round spins freely when Diego moves quickly to the center along a radius of the merry-go-round. As he does this, it's true to say that: a) the moment of inertia of the system decreases and the angular speed increases b) the moment of inertia of the system decreases and the angular speed decreases c) the moment of inertia of the system decreases and the angular speed remains the same d) the moment of inertia of the system increases and the angular speed increases e) the moment of inertia of the system increases and the angular speed decreasing
a) the moment of inertia of the system decreases and the angular speed increases
A yo-yo is paced on a horizontal surface as shown. There is sufficient friction for the yo-yo to roll without slipping. If the string is pulled to the right as shown with a force of constant magnitude F, a) the yo-yo rolls to the right b) the yo-yo rolls to the left c) the yo-yo first rolls to the right, then to the left d) the yo-yo remains at rest
a) the yo-yo rolls to the right
A yo-yo is placed on a horizontal surface as shown. There is sufficient friction for the yo-yo to roll without slipping. If the string is pulled straight up with a force of constant magnitude F, a) the yo-yo rolls to the right b) the yo-yo rolls to the left c) the yo-yo first rolls to the right, then to the left d) the yo-yo remains at rest
a) the yo-yo rolls to the right
A disc and a ring of same mass are rolling and if their kinetic energies are equal, then the ratio of their velocities will be: a) √4 : √3 b) √3 : √4 c) √3 : √2 d) √2 : √3
a) √4 : √3
Instantaneous velocity of the object at t=4 s: a)1 ms^-1 b)0.5ms^-1 c)0ms^-1 d)2 ms^-1
a)1 ms^-1
the maximum possible speed in nature is: a)the speed of light b)infinite c)unknown d)9.8ms^-1
a)10 ms^-2
The figure shows a 100kg block being released from rest from a height of 1.0m. It takes 0.53 s for it to reach the floor. What is the mass m of the block on the left. There is no friction or mass in the pulley and the connecting rope is very light. a) 16kg b) 14kg c)13kg d)11kg
a)16kg
A car accelerated from initial position and then returned at initial point, then: a)velocity is zero but speed increases. b) speed is zero but velocity increases. c) both speed and velocity increase. d) both speed and velocity decrease.
a)velocity is zero but speed increases.
A plumber pushes straight down on the end of a long wrench as shown. What is the magnitude of the torque he applies about the pipe at lower right? a) (0.80 m)(900 N)Sin 19° b) (0.80 m)(900 N)Cos 19° c) (0.80 m)(900 N)tan 19° d) (0.80 m)(900 N)(sin 19°)
b) (0.80 m)(900 N)Cos 19°
A person carries a 2.00N pebble through the path shown in the figure, starting at point A and ending at point B. The total time from A to B is 6.75 min. How much work did gravity do on the rock between A and B? a) 30 J b) -30 J c) -56 J d) -36 J
b) -30J
A machine is able to lift a mass of 200 kg vertically upto a height of 30 m above the ground in 50 seconds. The power of the machine is? a) 0.12 kW b) 1.2 kW c) 6 kW d) 300 kw
b) 1.2 kW
Two blocks are attached to the two ends of a string passing over a smooth pulley as shown in the figure. The magnitude of acceleration of the block will be: (sin 37= 0.6, sin 53 = 0.8) a)0.33 b) 1.33 c) 1 d) 0.066
b) 1.33
An object is dropped from a height h and strikes the ground with a velocity v. If the object is dropped from height of 2h, which of the following represents its velocity when it strikes the ground? a) v b) 1.4 v c) 2v d) 4v
b) 1.4 v
The moment of inertia of HCI molecule about an axis passing through its center of mass and perpendicular to the line joining the H+ and CL- ions will be, if the inter-atomic distance is 1 A^0: a) 0.61 x 10^-47 kg.m^2 b) 1.61 x 10^-47 kg.m^2 c) 0.061 x 10^47 kg.m^2 d) 0 kg.m^2
b) 1.61 x 10^-47 kg.m^2
The ratio of the weight of a man in a stationary life and when it is moving downward with uniform acceleration a is 3:2. The value of a is: a) 3/2 g b) 1/3 g c) 2/3 g d) g
b) 1/3 g
The ratio of the weight of a man in a stationary lift and when it is moving downward with uniform acceleration a is 3 : 2. The value of a is: a) 3/2 g b) 1/3 g c) 2/3g d) g
b) 1/3 g
A projectile launched straight up at 10 m/s will strike the ground at: a) 5m/s b) 10 m/s c) 25 m/s d) 50 m/s
b) 10 m/s
The Achilles tendon exerts a force of magnitude F=720 N. What is the magnitude of the torque that this force produces about the ankle joint? a)12 N.m b)16 N.m c)21 N.m d)26 N.m
b) 16 N.m
A stone projected vertically upwards from the ground reaches a maximum height h. When it is at a height 3h/4 the ratio of its kinetic and potential energy is: a) 3:4 b) 1:3 c) 4:3 d) 3:1
b) 1:3
A young child is sliding down a hill at an incline of 30 degrees on a sled with a total combined mass of 10kg. If the coefficient of friction between the hill and the sled is 0.3 and the length of the hill is 50m, how much work has been done by gravity when the child reaches the bottom of the hill? a) 1000 J b) 2500 J c) 3535 J d) 4330 J
b) 2500 J
A Block A of mass 7kg is placed on a frictionless table. a thread tied to it passes over a frcitionless pully and carries a body B of mass 3kg at the other end. The acceleration of the system is: a)100 ms^-2 b)3 ms^-2 c) 10 ms^-2 d) 30 ms^-2
b) 3 ms^-2
A block A of mass 7 kg is placed on a friction less table. A thread tied to it passes over a friction less pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is: a) 100ms^-2 b) 3 ms^-2 c) 10ms^-2 d) 30ms^-2
b) 3 ms^-2
Masses 8, 2, 4, 2 kg are placed at the corners A, B, C, D respectively of a square ABCD of diagonal 80 cm. The distance of center of mass from A will be a) 20cm b) 30cm c) 40cm d) 60cm
b) 30cm
Masses 8, 2, 4, 2 kg are placed at the corners A, B, C, D respectively of a square ABCD of diagonal 80cm. The distance of center of mass from A will be: a) 20cm b) 30cm c) 40 cm d) 60cm
b) 30cm
An in compressible ideal fluid flows steadily through a pipe that has a change in diameter. The fluid speed at a location where the pipe diameter is 8.0 cm is 1,28 ms^-1. What is the fluid speed at a location where the diameter has narrowed to 4.0 cm? a) 0.32 ms^-1 b) 5.1 ms^-1 c) 1.3 ms^-1 d) 0.64 ms^-1
b) 5.1 ms^-1
A rocket has a mass of 100kg. 90% of this is fuel. It ejects fuel vapours at the rate of 1 kgs^-1 with a velocity of 500 ms^-1relative to the rocket. It's supposed that the rocket is ourside the gravitational field. The initial upthrust on the rocker when it just starts moving upwards is a) 0 N b) 500 N c) 1000 N d) 2000 N
b) 500 N
A rocket has a mass of 100kg. 90% of this is fuel. It ejects fuel vapours at the rate of 1 kgs with a velocity of 500 ms relative to teh rocket. It is supposed that the rocket is outside the gravitational field. The initial upthrust on the rocket when it just starts moving upwards is: a) 0 N b) 500 N c) 1000 N d) 2000 N
b) 500N
An elevator weighing 6000 kg is pulled upward by a cable with an acceleration of 5 ms^-2. Taking g to be ms^-2 then the tension in the cable is: a) 6000 N b) 9000 N c) 60000N d) 90000N
b) 9000 N
A scooter has wheels with a diameter of 120mm. What is the angular speed of the wheels when the scooter is moving forward at 6.00 ms^-1? a) 47.7 rpm b) 955 rpm c) 72.0 rpm d) 100 rpm
b) 955 rpm
A spinning figure skater pulls his arms in as he rotates on the ice. As he pulls his arms in, what happens to his angular momentum L and kinetic energy K? a) L and K both increase b) L stays the same, K increases c) L increases; K stays the same d) L and K both stay the same. e) None of the above
b) L stays the same, K increases
The dimensional formula for ab/RT is: a) M^1 L^5 T^-2 b) M^0 L^2 T^-2 c) M^1 L^-1 T^-2 d) M^0 L^6 T^0
b) M^0 L^2 T^-2
If F = ax+bt^2 +c, x is distance, and t is time. Then what is the dimension of axc/bt^2 a) M^1 L^2 T^-2 b) M^1 L^1 T^-2 c) M^0 L^0 T^0 d) M^1 L^1 T^-1
b) M^1 L^1 T^-2
The van-der Waals equation is (p+a/v^2) (V-b) =RT, where P is the pressure, V the molar volume, and t is the temperature of the given sample of the gas. R is called molar gas constant a and b are called van-der Waal constants. The dimensional formula for b is same as that for: a) P b) V c) PV^2 d) RT
b) V
Four masses are joined to a light circular frame. The radius of gyration of this system about an axis passing through the center of the circular frame and perpendicular to its plane would be: a) a/√2 b) a c) 2a d) a/2
b) a
A cylinder is completely filled with water. The top of the cylinder is sealed with a tight-fitting lid. If you push down on the lid with a pressure of 1000 Pa, the water pressure at the bottom of the cylinder: a) increases by more than 1000 Pa b) increases by 1000 Pa c) increases by less than 1000 Pa d) in unchanged e) increases by an amount determined by the height of the cylinder
b) increases by 1000 Pa
A uniform ball is released from rest on a no-slip surface. After reaching its lowest point, the ball begins to rise again, this time on a friction-less surface.When the ball reaches its maximum height on the friction-less surface, it is a) higher than when it was released b) lower than when it was released c) at the same height from which it was released d) it's impossible to tell without knowing the mass of the ball e) it's impossible to tell without knowing the radius of the ball
b) lower than when it was released
Suppose a solid uniform sphere of mass M and radius R rolls without slipping down an inclined plane starting from rest. The angular velocity of the sphere at the bottom of the incline depends on: a) the mass of the sphere b) the radius of the sphere c) both the mass and the radius of the sphere d) neither the mass nor the radius of the sphere
b) the radius of the sphere
As the ball is going upwards: a) the velocity and acceleration both point up b) the velocity points up and the acceleration down c) the velocity points down and the acceleration up d) the velocity and acceleration both point down
b) the velocity points up and the acceleration down
A person completes half his journey with speed v1 and rest half with speed v2. The average speed of the person is: a) v= (v1+v2)/2 b) v = (2v1v2)/v1+v2 c) v= (v1v2)/ (v1+v2) d) v= v1xv2
b) v = (2v1v2)/v1+v2
A solid cylinder of mass M and radius R rolls without slipping down an inclined plane of length L and height h. What is the speed of its center of mass when the cylinder reaches its bottom: a) √(3gh/4) b) √(4gh/3) c) √4gh d) √2gh
b) √(4gh/3)
Average veloctiy of the object in 0 to 10 s: a)1 ms^-1 b)0.5 ms ^-1 C)0ms D)2 ms^-1
b)0.5 ms^-1
if the graph above is a velocity-time graph, what is the acceleration in first 3s? a)3 ms^-2 b)10m S^-2 c)30m s^-2 d)45ms^-2
b)10 m S^-2
A constantly accelerating particle travels for 3 s. If its 2 initial velocity is 10 ms^-1 and it travels 75m, what is its acceleration? a)5 m s^-2 b)10 m s^-2 c)16.67 m s^-2 d)25 m s^-2
b)10 m s^-2
A constantly accelerating particle increases its velocity from 10 ms^-1 20ms^-1 in 1 s. What is its acceleration during this time? a)5 m s ^-2 b)10 m s ^-2 c)15m S^-2 d) 20 ms^-2
b)10m s^-2
The plane above is inclined at a 30 angle. The coefficient of static friction between the mass and the plane is 0.2. The mass is 100kg. What is the minimum force F necessary to prevent the mass from sliding down? a) 0N b) 327N c)500N d)673N
b)327N
If the graph above is a veloity-time graph, what is the distance traveled in the first 3s? a)30m b)45m c)90m d)180m
b)45m
The velocity of a moving particle depends upon time t as v=at+(b/t+c). The dimensional formula for b is: a)M^0 L^0 T^0 b)M^0 L^1 T^0 c)M^0 L^1 T^-1 d)M^0 L^1 T^-2
b)M^0 L^1 T^0
Some helicopters have two large rotors that rotate in opposite directions. If instead they both rotated in the clockwise direction, what would happen to the body of the helicopter if the pilot increased the rotation speed of both rotors? a)The body would rotate clockwise b)The body would rotate counterclockwise c)Nothing there would be no effect on the body d)The answer depends on how fast the rotors rotate
b)The body would rotate counterclockwise
The action reaction forces described in Newton's third law: a) always cancel each other b)always act on different objects c) always act on the same object d) may be perpendicular to eachother
b)always act on different objects
As the ball is going upwards: A) the velocity and acceleration both point up b)the velocity points up and the acceleration down c)the velocity points down and the acceleration ip d)the velocity and acceleration both point down
b)the velocity points up and the acceleration down
As the ball is going upwards: A)the velocity and acceleration both point up b)the velocity points up and the acceleration down c)the velocity points down and the acceleration up d) the velocity and acceleration both points down
b)the velocity points up and the acceleration down
The slope of a displacement- time graph is: a)distance b)velocity c)acceleration d)none of the above
b)velocity
The output of a truck is 4500 J and its efficiency is 50%, the input energy provided to the truck is: a) 5000 J b) 900 J c) 9000 J d) 500 J
c ) 9000 J
A 200 kg roller coaster starts from 50 m above the ground. It falls toward the ground with out any friction then once it reaches the ground level, the brakes are applied over 30 m in order to bring the coaster to a complete stop. How much work is done by the brakes? a) 10x10^4 J b) 10x10^5 J c) -10x10^4 J d) -10x10^5 J
c) -10x10^4J
Acceleration of the object in first 5 s: a)1 ms^-1 b)9.8 ms ^-1 c)0 ms ^-2 d)2 ms ^-1
c) 0 ms^-1
A steel wire of length 4.7 m and cross section 3 x 10^3 m^2 stretches by the same amount as a copper wire of length 3.5 m and cross section 4 x 10^-5 m^2 under a given load. What is the ratio of the Young's modulus of steel to that of copper? a) 3.83 x 10^3 b) 1.46 x 10^-2 c) 1.79 x 10^-2 d) 5.85 x 10^-3
c) 1.79 x 10^-2
A steel wire of length 4.7 m and cross section 3 x 10^3 m^2 stretches by the same amount as a copper wire of length 3.5 m and cross section 4 x 10^-5 m^2 under a given load. What is the ratio of the Young's modulus of steel to that of copper? a) 3.83 x 10^3 b) 1.46 x 10^-2 c) 1.79 x 10^-8 d) 5.85 x 10^-3
c) 1.79 x 10^-8
A 1000 kg gondola is operated on a cable between two towers 340 m apart. When the gondola is exactly between the two towers, it is 100m below their height. What is the tension in the cable at this mid point? a) 5kN b) 8kN c) 10 kN d) 20kN
c) 10 kN
Calculate the force required to double the length of a steel wire of area of cross section 5 x 10^-5 m^2. (Y= 2 x 10^11 N m^2) a) 10^-5 N b) 10^-7 N c) 10^7 N d) 10^5 N
c) 10^7 N
Calculate the force required to double the length of a steel wire of area of cross section 5 x 10^-5m^2. (Y=2 x 10^11 Pa) a) 10^-5 N b) 10^6 N c) 10^7 N d) 2N
c) 10^7 N
Calculate the force requires to double the length of a steel wire of area of cross section 5 x 10^-5 m^2. 9Y=2 x 10^11 Pa) a) 10^-5 N b) 10^6 N c) 10^7 N d) 2N
c) 10^7 N
A man weighs 80kg. He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5 m/s what would be the reading on the scale? a) 400 N b) 80N c) 120 N d) 0N
c) 120 N
A man weighs 80kg. He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5ms^-2. What would be the reading on the scale? a) 400N b) 800N c) 1200N d) 0N
c) 1200N
A particle moves with a velocity v=5i-3j+6k m/s under the influence of a constant force F= 10i+10j+20 k N. The instantaneous power applied to the particle is: a) 200 J/s b) 40 J/s c) 140 J/s d) 170 J/s
c) 140 J/s
Two blocks of mass 4kg and 6kg are placed in contact with each other on a friction less horizontal surface. If we apply a push of 5 N on the heavier mass, the force on the lighter mass will be: a) 5N b) 4N c) 2 N d) None of the above
c) 2 N
The initial volume of water = 100 liter: pressure increase = 100 atm; final volume = 100.5 liter. Compare the bulk modulus of water with that of air at constant temperature? a) 3 x 10^5 b) 1 x 10^3 c) 2 x 10^4 d) 6 x 10^11
c) 2 x 10^4
The initial volume of water = 100 liter; pressure increase = 100 atm; final volume = 100.5 liter. Compare the bulk modulus of water with that of air at constant temperature? a) 3 x 10^5 b) 1 x 10^3 c) 2 x 10^4 d) 6 x 10^11
c) 2 x 10^4
The initial volume of water = 100 liter; pressure increase = 100 atm; final volume = 100.5 liter. Compare the bulk modulus of water with that of air at constant temperature? a)3 x 10^5 b)1 x 10^3 c)2 x 10^4 d)6 x 10^11
c) 2 x 10^4
Two masses m and m2 are attached to a string which passes over a frictionless smooth pulley. When m=10kg, m2=6, the accelleration of the masses is: a)20ms^-2 b) 5ms^-2 c) 2.5 ms^-2 d) 10 ms^-2
c) 2.5 ms^-2
Two masses m1 and m2 are attached to a string which passes over a frictionless smooth pulley. When m1= 10kg, m2=6kg, the acceleration of masses is: a) 20 ms^-2 b) 5ms^-2 c) 2.5ms^-2 d) 10ms^-2
c) 2.5ms^-2
Find the weight required to stretch a steel road by 2mm, if the length of the road is 2 m and diameter 4 mm. Y = 200 GPa and g= 9.8 ms^2? a) 356.4 kg b) 295.4 kg c) 365.4 kg d) 256.4 kg
c) 256.4kg
Two blocks of mass 4 kg and 6 kg are placed in contact with each other on a friction less horizontal surface. If we apply a push of 5 N on the heavier mass, the force on the lighter mass will be: a) 5N b) 4N c) 2N d) None of the above
c) 2N
A projectile launched straight up at 10 m/s will be in the air for: a) 1 s b) 1.4 s c) 2s d) 5s
c) 2s
A wheel initially at rest, is rotated with a uniform angular acceleration. The wheel rotates through an angle θ1 in first one second and through an additional angle θ2 in the next one second. The ratio θ1/ θ2 is given by: a) 4 b) 2 c) 3 d) 1
c) 3
A wheel initially at rest, is rotated with a uniform angular acceleration. The wheel rotates through an angle θ1 in first one second and through an additional angle θ2 in the next one second. The ratio θ2/θ1 is given by: a)4 b)2 c)3 d)1
c) 3
A mobile is shown in the figure. The horizontal supports have negligible mass. Assume that all the numbers given in the figure are accurate to two significant figures. What mass M is required to balance the mobile? a)18g b)30g c)36g d)60g
c) 36
A child tosses a 1kg book across the room at a speed of 3 m/s. What is the kinetic energy of the book? a) 1 J b) 3 J c) 4.5 J d) 9 J
c) 4.5 J
The wheels of an automobile are locked as it slides to a stop from an initial speed of 30 m/s. If the coefficient of kinetic friction is 0.600 and the road is horizontal approximately how long does it take the car to stop? a) 4.22 s b) 8.75 c) 5.10 d) 10.4
c) 5.10 s
A piano mover raises a 1000 N piano at a constant speed using a very light rope in frictionless pulley system, as shown in the figure. With what force is the mover pulling down on a the rope? a) 2000N b) 1000N c)500N d) 250 N
c) 500N
A hollow cylinder pillar of external diameter 24 cm and internal diameter of 20 cm is 4 m tall. How much will it contract under a load of 50,000 kg? ( Y=21 x 10^10 Nm^-2) a) 0.532 x 10^-3m b) 1.532 x 10^-3m c) 6.75 x 10^-4 m d) 2.532 x 10^3m
c) 6.75 x 10^-4 m
The plane above is inclined at a 60 angle. the coefficient of static friction between the mass and the plane 0.2. The mass is 100kg. What is the minimum force F necessary to prevent the mass from sliding down the plane? a) 0N b) 500 N c) 766 N d) 966 N
c) 766 N
Three blocks of masses 2 kg, 3 kg, and 5 kg are connected to each other with light string and are then placed on a friction less surface. The system is pulled by a force F= 10N, the tension T1: a) 1N b) 5N c) 8N d) 10N
c) 8N
Three blocks of masses 2kg, 3kg and 5kg are connected to each other with a light string and are then placed on a frictionless surface as shown in the figure. The system is pulled by a force F= 10N, then tension T: a) 1N b) 5N c) 8N d)10N
c) 8N
A car moves 3 x as fast as another identical car. Compared to the slower car, the faster car has: a) 3 x the KE b) 6 x the KE c) 9 x the KE d) 27 x the KE
c) 9 x the KE
A sphere contracts its volume by 0.1% when taken to the bottom of a sea 1km deep. Find the bulk modulus of the material of the sphere? Density of the sea water 10^3kgm^-3 a) 8.5 x 10^9 Nm^-2 b) 8.5 x 10^-9Nm^-2 c) 9.8 x 10^9 Nm^-2 d) 4.8 x 10^9 Nm^-2
c) 9.8 x 10^9 Nm^-2
An old LP record that is originally rotating at 33.3 rad.s^-1 is given a uniform angular acceleration of 2.15 rad.s^-2. Through what angle has the record turned when its angular speed reaches 72.0 rad.s^1? a) 83.2 rad b) 316 rad c) 948 rad d) 66.8 rad
c) 948 rad
A thin, very light wire is wrapped around a drum that is free to rotate. The free end of the wire is attached to a ball of mass m. The drum has the same mass m. Its radius is R and its moment of inertia is I = (1/2)mR^2. As the ball falls, the drum spins. At an instant that the ball has transnational kinetic energy K, what is the rotational kinetic energy of the drum? a) K b) 2K c) K/2 d) K/4
c) K/2
The dimensional formula for a is same as that for: a) V^2 b) P c) PV^2 d) RT
c) PV^2
In the above question (Q.22), given that m2 =2 m and the tension in the string will be: a) 4T b) 3/2 T c) T d) 2/3 T
c) T
Salt water has a greater density than fresh water. A boat floats in both fresh water and in salt water. Where is the buoyant force greater on the boat? a) In salt water b) In fresh water c) The buoyant force is the same in both cases.
c) The buoyant force is the same in both cases.
Which of the following does not posses the same dimensional formula as that for RT: a) PV b) Pb c) a/V^2 d) ab/V^2
c) a/V^2
Consider a uniform hoop of radius R and mass M rolling without slipping. Which is larger, its translational kinetic energy or its rotational kinetic energy? a) Translational kinetic energy is larger b) Rotational kinetic energy is larger c) both are equal d) You need to know the peed of the hoop to tell
c) both are equal
Instantaneous speed and average speed are equal: a) never b)for accelerated motion c)for motion at constant speed d) always
c) for motion at constant speed
Which of these are fundamental physical quanities? a) space, time and matter b) kilograms, seconds and meters c) length, time and mass d) momentum, energy and mass
c) length, time and mass
A disk, a hoop, and a solid sphere are released at the same time at the top of an inclined plane. They are all uniform and roll without slipping. In what order do they reach the bottom? a) disk, hoop, sphere b) hoop, sphere, disk c) sphere, disk, hoop d) hoop, disk, sphere
c) sphere, disk, hoop
In a certain cyclotron, a proton of mass 1.67 10^-27 kg moves in a circle of diameter 1.6 m with an angular speed of 2.0 10^6 rad.s^-1. What is the angular momentum of the proton? a)1.3 x 10^-21 kg.m^2s^-1 b)2.1 x 10^-21 kg.m^2s^-1 c)1.8 x 10^-21 kg.m^2s^-1 d)3.2 x 10^-21 kg.m^2s^-1
c)1.8 x 10^-21 kg.m^2s^-1
If the graph above is a velocity-time graphy, what is the acceleration between 3.25 s and 5.50s? a)0m s^-2 b)-5m s^-2 c)10m s^-2 d)-10m s^-2
c)10m s^-2
A wheelchair access ramp is to be designed so that 1000 N can be lifted to the height of 1 m through the application of 50 N of force. The length of the ramp must be at least: a) 5m b)10m c) 20m d) 100m
c)20
A particle with an initial of 50 ms^-1 slows at a constant acceleration to 20 ms^-1 over a distance of 105m. How long does it take for the particle to slow down? a)2s B)4s c)3s d)5s
c)3s
For 10^(at+3) the dimension of a is: a)M^0L^0T^0 b)M^0L^0T^1 c)M^0L^0T^-1 d)None of these
c)M^0L^0T^-1
which of these are fundamental physical quantities? a)space,time, and matter b)kilograms,seconds, and meters c)length,time,mass d)momentum,energy,and mass
c)length,time, and mass
An aircraft approaches a runway that runs directly east as a strong wind blows out of the south. The direction that the aircraft should point in order to land on the runway. a)north b)east of north c)south of east d)west
c)south of east
A solid bowling ball rolls down a ramp. Which of the following forces exerts a torque on the bowling ball about its center? a) the weight of the ball b) the normal force exerted by the ramp c)the friction forces exerted by the ramp d) more than one of the above e) depends on whether the ball rolls without slipping
c)the friction forces exerted by the ramp
A force F= (4N)i + (3N)j acts on an object at a point located at the position r= (6m)k. What is the torque that this force applies about the origin? a)Zero b) (24N.m)i + (18 N.m)j c) (-24 N.m)i -(18 N.m)j d) (-18 N.m)i + (24 N.m)j e) (-18 N.m)i -(24 N.m)j
d) (-18 N.m)i + (24 N.m)j
A 7kg ball is dropped from 20 m. If the speed just before it hits the ground is 18 m/s, what is the work done by air resistance? a) 266J b) 13J c) -13J d) -266J
d) -266
In the above problem (Q. 22) what is the tension of the string? a) 100 b) 50 c) 25 d) 0
d) 0
Two masses m and m2 are attached to the ends of a string which passes overa pulley attached to the top of an inclined plane. The angle of inclination of the plane is theta. g=10. if m=10kg, m2= 5kg, theta =30, what is the acceleration of m2? a) 10 b) 5 c) 2/3 d) 0
d) 0
A 2kg block is dropped from a height of 0.4 m on a spring force constant K = 40,000 N/m. The maximum compression of the spring is: a)0.1 m b) 0.2m c) 0.05m d) 0.02
d) 0.02
Twenty miliseconds is: a) 0.00002 s b) 0.0002 s c) 0.002s d) 0.02s
d) 0.02 s
A body of mass 2 kg is hung on a spring balance mounted vertically in a lift. If the lift descends with an acceleration equal to the acceleration due to gravity g, the reading on the spring balance will be: a) 2kg b) 4g kg c) 2g kg d) 0N
d) 0N
A body of mass 2kg is hung on a spring balance mounted vertically in a lift. If the lift descends with an acceleration equal to the acceleration due to gravity g, the reading on the spring balance will be: a) 2kg b) 4g kg c) 2g kg d) 0 N
d) 0N
Two masses m1 and m2 are attached to the ends of a string which passes over a pulley attached to the top of an inclined plane. The angle of inclination of the plane in θ. Take g= 10ms^-2. If m1= 10kg, m2= 5kg, θ = 30°, what is the acceleration of mass m2? a) 10ms^-2 b) 5ms^-2 c) 2/3ms^-2 d) 0ms^-2
d) 0ms^-2
A ballet dancer is spinning in the middle of a horizontal friction less stage. Which of the following things could he change by moving parts of his body or his whole body? 1) his total kinetic energy 2) his translational kinetic energy 3) his rotational kinetic energy 4) his angular momentum 5) his moment of inertia 6) the horizontal component of his linear momentum 7) the location of his center of mass a) 1,2,& 3 b) 2, 3, 4, 5, 6, & 7 c)1,2,3,4, & 6 d) 1,2,3,4,5 & 7
d) 1,2,3,4,5 & 7
An athlete holds a 7.5kg shot put in his hand with his lower arm horizontal. His lower arm has a mass of 2.8 kg and its center of gravity (or center of mass) is 12 cm from the elbow-joint pivot. How much force must the extensor muscle (which is M in the figure) in the upper arm exert on the lower arm? a)100N b)500N c)1500N d)1000N
d) 1000N
An air bubble of diameter 2 cm rises through a long cylindrical column of a viscous liquid and travels at 0.21 x 10^-2 ms^-1. Find its coefficient of viscosity. Ignore density of air. Density of liquid = 1.47 x 10^-3 kgm^-3? a) 200.1 kg.m^-1 s^-1 b) 168.4 kg.m^-1 s^-1 c) 186.7 kg.m^-1 s^-1 d) 152.5 kg.m^-1 s^-1
d) 152.5 kg.m^-1 s^-1
An air bubble of diameter 2 cm rises through a long cylindrical column of a viscous liquid and travels at 0.21 x 10^-2 m/s. Find its coefficient of viscosity. Ignore density of air. Density of liquid = 1.47 x 10^-3 m/s. a) 200. 1 kg/ms b) 168.4 kg/ms c) 186.7 kg/ms d) 152.5 kg/ms
d) 152.5 kg/ms
An ideal spring has a spring constant (force constant ) of 2500 N/m is stretched 4cm. How much work is required to stretch the spring by 4 cm? a) 4 J b) 0 J c) 3 J d) 2 J
d) 2 J
The figure shows a famous roller coaster ride. You can ignore friction. If the roller coaster leaves point Q from rest, what is the speed at the top of the 25 m peak? (point S) a) 10 m/s b) 44 m/s c) 120 m/s d) 22 m/s
d) 22 m/s
A student pushes a crate by applying 10 N force over 5 minutes. What is the impulse experienced by the crate a) 0.5 Ns b) 50 Ns c) 300 Ns d) 3000 Ns
d) 3000 Ns
A person is pulling a block of mass m with a force equal to its weight directed 30 degrees above the horizontal plane across a rough surface, generating a friction f on the block. If the person is now pushing downward on the block with the same force 30 degrees above the horizontal plane across the same rough surface, what is the frction on the block? (uk is the coefficient of kinetic friction across the surface) a) f b) 1.5 f c) 2f d) 3f
d) 3f
If you go twice as fast, your kinetic energy becomes: a) 2 x smaller b) 4 x smaller c) 2 x bigger d) 4 x bigger
d) 4 x bigger
Water flowing through a cylindrical pipe suddenly comes to a section of pipe where the diameter decreases to 86% of its previous value. If the speed of the water in the larger section of the pipe was 32 ms^-1. What is the speed in this smaller section if the water behaves like an ideal incompressible fluid? a) 37ms^-1 b) 28ms^-1 c) 24ms^-1 d) 43ms^-1
d) 43ms^-1
A solid uniform 3.3 kg disk has a thin string of negligible mass wrapped around its rim, with one end of the string tied to the ceiling. The disk is released from rest and as it falls, it turns as the string unwraps. At the instant it center has fallen 2.25m, how fast is the center moving? a)2.5 ms^-1 b)3.6 ms^-1 c)4.3 ms^-1 d)5.4 ms^-1
d) 5.4 ms^-1
An object dropped from a height of 13 m strikes the ground at 16 m/s. In order for the object to strike the ground at 32 m/s it must be dropped from: a) 18m b) 26 m c) 39 m d) 52 m
d) 52 m
The plane above is inclined at a 30 angle. The coefficient of kinetic friction between the mass and plane is 0.1. The mass is 100kg. Once the mass is moving, what is the minimum force F necessary to pull the mass up the plane? a)59N b)413N c)509N d)587N
d) 587N
A turbine fan in a jet engine has a moment of inertia of 2.5 kg.m^2 about its axis of rotation. As the turbine starts up its angular velocity is given by ωz =40 rad.s^-3 t^2. Find the net torque on the fan at t= 3.0 s? a) 200 N.m b) 900 N.m c) 400 N.m d) 600 N.m
d) 600 N.m
Three rings each of mas M and radius R are arranged as shown in the figure. The moment of inertia of the system about YY' will be: a) 3MR^2 b) 3/2MR^2 c) 5/2MR^2 d) 7/2MR^2
d) 7/2MR^2
The plane above is inclined at a 30 angle. The coefficient of kinetic friction between the mass and the plane is 0.1. The mass is 100kg. If the mass is moving inclined plan at a velocity of 2 m/s, what tension should be applied to the rope in order to make the mass reverse directions in exactly 1s? a)213 N b) 387 N c) 613N d) 787 N
d) 787
How much work is needed to lift a box of mass 2kg up a height of 3m using a pulley system with 75% efficiency? a) 4J b) 8J c) 40J d) 80J
d) 80J
An elevator weighing 6000 kg is pulled upward by a cable with an acceleration of 5 ms-2. Taking g to be 10 ms-2, the tension in the cable is: a) 6000 N b) 9000 N c) 60000N d) 90000 N
d) 90000N
The plane above is inclined at a 60 angle. The coefficient of static friction between the mass and the plane is 0.2. The mass is 100kg. What is the minimum force F necessary to start the object moving up the plane? a) 500 N b) 766 N c) 866 N d) 966 N
d) 966N
A 10 kg block is set moving with an initial speed of 6 m/s on a rough horizontal surface. If the force of friction is 20 N, approximately how far does the block travel before it stops? a) 1.5m b) 6 m c) 3m d) 9m
d) 9m
If Force = (x/density) + C is dimensionally correct, the dimension of x are: a) MLT^-2 b) MLT^-3 c) ML^2T^-3 d) M^2L^-2T^-2
d) M^2L^-2T^-2
As the mass of the projectile increases, the range R a) Decreases b) Increases c) Increases then decreases d) Remains the same
d) Remains the same
At which of the indicated points is the pressure the greatest? a) A b) B c) C d) The pressure is the same at each of the labeled points
d) The pressure is the same at each of the labeled points
A stone can slide down one of four different frictionless ramps as shown in the figure. For which ramp will the speed of the ball be the greatest at the bottom? a) RAmp X b) Ramp Y c) Ramp Z d) The speed of the ball will be the same for all ramps
d) The speed of the ball will be the same for all ramps
A push of magnitude P acts on a box of weight W as shown in the figure. The push is directed at an angle theta below the horizontal, and the box remains a rest. The box rests on a horizontal surface that has some friction with the box. The normal force on the box due to the floor is equal to: a) W b) W + P c) W+P cos theta d) W + P sin theta e) W- Psin theta
d) W + P sin theta
An incompressible fluid with zero viscosity flows through a pipe of varying radius. Compared to the fluid at point P, the fluid at point Q has: a) a greater pressure and a greater volume flow rate b) a greater pressure and the same volume flow rate c) the same pressure and a greater volume flow rate d) a lower pressure and the same volume flow rate e) None of the above
d) a lower pressure and the same volume flow rate
The metric prefix that means one thousand is : a)milli b) centi c) mega d) kilo
d) kilo
In the above problem (Q. 22), given that m2 = 2 m1 and m2 moves vertically downwards with acceleration a. If the position of the masses are reveresed, the acceleration of m2 down the inclined plane will be: a) 2a b) a c) a/2 d) None of the above
d) none of the above
The slope of a distance vs time graph is the: a) distance b)velocity c) acceleration d) none of the above
d) none of the above ( Speed)
The sphere on the right has twice the mass and twice the radius of the sphere on the left. Compared to the sphere on the left, the larger sphere on the right has: a) twice the density b) the same density c) half the density d) one-quarter the density e) one-eight the density
d) one-quarter the density
A hollow sphere of negligible mass and radius R is completely filled with a liquid so that its density is p. You now enlarge the sphere so its radius is 2R and completely fill it with the same liquid. What is the density of the enlarged sphere? a) 8p b) 4p c) p/2 d) p
d) p
As the mass of the projectile increases, the range R: A) decreases B)increases C)increases then decreases D)remains the same
d) remains the same
Compared to a gear tooth on the rear sprocket (on left of small radius) of a bicycle, a gear tooth on the front sprocket (on right, of large radius) has : a) faster linear speed and a faster angular speed b) the same linear speed and a faster angular speed c) a slower linear speed and the same angular speed d) the same linear speed and a slower angular speed e) none of the above
d) the same linear speed and a slower angular speed
A block of ice (density 920 kg. m^-3), a block of concrete (density 2000 kg. m^-3), and a block of iron (density 7800 kg. m^-3) are all submerged in the same fluid. All three blocks have the same volume. Which block experiences the greatest buoyant force? a)The block of ice experiences the greatest buoyant force b)The block of concrete experiences the greatest buoyant force. c)The block of iron experiences the greatest buoyant force. d)All three experience the same buoyant force. e)The answer depends on the density of the fluid.
d)All three experience the same buoyant force.
You want to double the radius of a rotating sold sphere while keeping its kinetic energy constant. (The mass does not change) To do this, the final angular velocity of the sphere must be: a)four times its initial value b)twice its initial value c)the same as its initial value d)half of its initial value e)one-quarter of its initial value
d)half of its initial value
The metric prefix that means one thousands is: a)milli- b)centi- c)mega- d)kilo-
d)kilo-
A nurse must apply thumb pressure P to administer an injection of a viscous liquid using a hypodermic needle with a small inside radius R. If instead the nurse uses a needle of the same length but with an even smaller inside radiusR/2, how much thumb pressure will be required? a) 1.414 p b) 2p c) 4p d) 8p e) 16p
e) 16p
